Option D. osmosis is the cellular transport is the teacher demonstrating in the given case.
Osmosis is the flow of water through a semi-permeable membrane from an area of higher water concentration
to an area of lower water concentration. When the egg was placed in a solution of vinegar,
- vinegar reacts with the eggshell, bubbles surround the egg and dissolve the shell.
- It is known vinegar is a weak acid diluted with lots of water
- Water moves from the vinegar, through the egg’s semi-permeable membrane, into the egg due to osmosis.
When the egg was placed in the salt solution that had a higher concentration of water than was inside the egg,
- water moves into the egg.
- The egg will become larger when placed in the salt solution due to the solution’s low salt concentration and sinks in the solution.
Thus, the correct answer is - option D. osmosis.
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